Cell-compatible conducting polyaniline films prepared in colloidal dispersion mode

Area of Science:

• Materials Science
• Biotechnology
• Polymer Chemistry

Background:

• Conductive polymers like polyaniline are crucial for biomedical and biotechnological applications.
• Modifying polyaniline's surface properties is key for its use in tissue engineering and biosensors.

Purpose of the Study:

• To develop an innovative technique for preparing polyaniline films using in-situ polymerization.
• To evaluate the impact of different stabilizers on polyaniline film properties and cell compatibility.

Main Methods:

• Polyaniline films were prepared via in-situ polymerization in colloidal dispersion using four stabilizers: poly-N-vinylpyrrolidone, sodium dodecylsulfate, Tween 20, and Pluronic F108.
• Characterization included contact-angle measurement (surface energy), van der Pauw method (conductivity), Fourier-transform infrared spectroscopy (spectroscopic features), and fibroblast assays (cell compatibility).
• In-vitro testing on a 3D-reconstructed human tissue model assessed skin irritation.

Main Results:

• Stabilizers significantly influenced the surface energy, electrical conductivity, spectroscopic features, and cell compatibility of polyaniline films.
• Polyaniline films prepared with sodium dodecylsulfate exhibited a favorable combination of high conductivity and good cell compatibility.
• These sodium dodecylsulfate films were found to be non-irritant to skin in in-vitro tests.

Conclusions:

• The choice of stabilizer critically affects the properties and biocompatibility of polyaniline films.
• Sodium dodecylsulfate is a promising stabilizer for developing conductive polyaniline materials for biomedical applications, including skin contact.
• This study provides a foundation for designing advanced polyaniline-based materials for tissue engineering and biosensing.